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I have AVIC U220 and the SD card only has one file called device.dat in the AVIC-APP folder. I am trying to update the Navigation

I will be honest with you, I have no clue how to go about doing this. Any help will be appreciated it.

I was able to get my hands on Pioneer 2012 map upgrade but dont really know how to go about properly transferring that onto the SD card.

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